Using the function fzero in a for loop

I have three functions

fn1 = At^2 + Bt + C

fn2 = Mt + N

fn3 = Zt + W

where the coefficients [A,B,C,M,N,Z,W] correspond to columns [1,2,3,4,5,6,7] of the following data set

12 4 8 7 1 1 2

9 2 2 1 5 5 1

2 7 9 6 6 5 6

each row represents a set of coefficients.

My goal is to find the x values and y values for every intersection point for each set of coefficients.

So far, I have found out how to find the intersecting values for only one set, but I am not sure how to use a for loop when using fzero. Below is what I have for one row and my attempt at implementing a for loop.

 for i = 1:1:r

 int_1(i) = Fn1(i) - Fn2(i);

 int_2(i) = Fn1(i) - Fn3(i);

 end

 X1 = fzero(int_one,0);
 I used the line above to find the x values 
 Y1 = F2(X1);
 I used the line above to find its corresponding y values.
 This works.

Here, r is the number of rows in the matrix, in my case, r is 20. This works. it subtracts the functions at every iteration and stores the results correctly in int_1 and int_2. Then, I use the function fzero to find its corresponding y values closest to the value 0 and closest to the value 3. 0 and 3 are the starting and ending values on my x axis. However, the following:

 for ii = 1:1:r

 X1(ii) = fzero(int_one(ii),0);

 X2(ii) = fzero(int_two(ii),0);

 X3(ii) = fzero(int_two(ii),3);

 X4(ii) = fzero(int_one(ii),3);

 Y1(ii) = F2(X1(ii));

 Y2(ii) = F3(X2(ii));

 Y3(ii) = F3(X4(ii));

 Y4(ii) = F2(X3(ii));

 end

The code above does not work, and I am not sure why. I have tried

X1(ii) = fzero(@(m)int_one(m,ii),0); for the x values but this also does not work.

If someone could guide me I would greatly appreciate it.